What are false friends?
"False friends" are words that look the same in English and Spanish but mean completely different things. Some cause minor confusion. Others — like the ones at the catastrophic level — have caused truly mortifying situations for real Spanish speakers. Here are the 15 most important ones, organised from least to most dangerous.
We start with the practical part: the 15 cards, grouped into three danger levels. Then the data on cognates, why these false friends exist, and how to avoid them for good.
The 15 false friends, from least to most dangerous
Organised into three danger levels. Tap each card to see what the word really means, a real-use example, and the nuance that saves you from the mistake.
Mild level
These mistakes cause confusion but rarely real embarrassment. Context usually saves the situation.
You will meet it at the office and on bills: "the actual figures", "the actual cost". In an interview, your current job is "my current job".
Very common at the office and with your landlord: "a sensible option", "sensible shoes". If your GP says "be sensible", they are asking for caution, not sensitivity.
You will see it on clothing labels ("delicate fabric") and laundry instructions. If you work in manufacturing, your workplace is "the factory", never "the fabric".
In the UK your local library is free: membership, wifi and children's activities. If you want to buy a book, ask for a "bookshop", not a "library".
Key for school paperwork: if they mention your teenager's "college", it means sixth form or vocational study (16-18). A young child attends "primary school".
Medium level
These mistakes can make you look bad in professional or formal social contexts.
At the office and the GP: "medical records" are your history, and "we'll record the call" means they are taping it — not remembering it.
Careful in interviews: "I pretend to improve my English" sounds like you are faking it. Say "I intend to improve my English" and the message stays professional.
At work you will say "I attended the meeting", and hear "Can I assist you?" in shops and phone lines — they are offering help, not company.
You will hear it in office small talk and on TV ("How bizarre!"). Use it freely for odd situations — it says nothing about bravery.
A classic GP mix-up: arrive with a runny nose, say "I'm constipated", and they will ask about your digestion. Get it clear before your first UK appointment.
Catastrophic level
These mistakes have caused truly embarrassing situations for real Spanish speakers. Memorise these above all others.
The most famous false friend, and it shows up where it matters most: at the GP or at work. If you are expecting, say "I'm pregnant" — plainly and proudly.
You will hear it daily: colleagues "excited" about a project, children "excited" about Christmas. Use it freely at the office — one of the most positive words in English.
The most dangerous on the list: at work or with neighbours, "he's molesting me" sounds like an abuse allegation. Always say "he's bothering me" or "annoying me".
You will see it in flat listings ("carpeted bedroom") and landlord inspections. At the office, the document goes "in the folder", not "on the carpet".
You will meet it during a move and at hardware shops ("rope", "string"). In clothes shops ask for "clothes" — asking for "rope" sends you to the DIY aisle.
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The data on cognates and false friends
10,000-15,000 shared cognates
Because of their shared Latin roots, English and Spanish have between 10,000 and 15,000 cognates: 30% to 40% of English words have a recognisable Spanish equivalent. That very closeness is what makes false friends so treacherous.
Source: Applied Linguistics, Oxford Academic (academic.oup.com).
Only 1-2% are false friends
The good news: around 90% of English words that look like a Spanish one are true cognates (they mean the same thing). False friends make up a very small share of the vocabulary — between 1% and 2.3% across studies — but they cause the most memorable misunderstandings.
Source: Applied Linguistics, Oxford Academic (academic.oup.com).
60% lexical similarity in formal register
In formal and academic English, lexical similarity with Spanish rises to 60%, because both share a huge base of Latin vocabulary. That is why false friends show up so often in professional contexts — exactly where a misunderstanding costs the most.
Source: Applied Linguistics, Oxford Academic (academic.oup.com).
Why false friends exist
Spanish and English share Latin roots and a long history of cultural exchange. Many words evolved in parallel but took on different meanings over time. The result: words that look like direct translations but are not.
That is why the instinct of "if it looks similar, it means the same" is right most of the time — and fails spectacularly in the cases you have just seen. The solution is not to distrust every cognate, but to know the short list of the ones that betray you.
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How to avoid false friends for good
Memorisation works short-term, but in a real conversation the brain falls back on automatic responses. The only way to avoid these mistakes permanently is to have heard them in real context enough times that the correct form comes out naturally.
That is what comprehensible input achieves — hearing real English, in context, repeatedly. NexSpeak stories are designed exactly to create that automaticity.
Frequently asked questions
What are false friends in English and Spanish?
False friends are words that look similar in English and Spanish but have completely different meanings. For example, "embarrassed" does not mean "pregnant" (embarazada) — it means feeling ashamed. They exist because English and Spanish share Latin roots and many words evolved in parallel but took on different meanings over time.
What are the most dangerous false friends between English and Spanish?
The most dangerous false friends include: "embarrassed" (ashamed, not pregnant), "excited" (enthusiastic, not sexually aroused), "molest" (to sexually abuse, not to bother), "carpet" (a floor rug, not a folder), "constipated" (unable to pass stools, not having a cold), "library" (a lending library, not a bookshop), "sensible" (reasonable, not emotionally sensitive), "fabric" (cloth/textile, not a factory), "record" (to film/register, not to remember) and "pretend" (to fake, not to intend).
Why does "embarazada" not translate to "embarrassed"?
"Embarazada" in English means "pregnant". "Embarrassed" means feeling ashamed or uncomfortable. They are false friends because they share the same Latin origin but evolved into opposite meanings. Saying "I'm embarrassed" when you mean "I'm pregnant" — or vice versa — is one of the most common and confusing mistakes Spanish speakers make in English.
What is the difference between "library" and "bookshop" in English?
"Library" in English means biblioteca — the place where books are lent for free. The word for "librería" (a shop that sells books) is "bookshop" or "bookstore". This is one of the most common false friend mistakes among Spanish speakers visiting or living in the UK.
What does "sensible" mean in English?
"Sensible" in English means "reasonable", "practical" or "having good judgment" — not emotionally sensitive. To express that someone is "sensible" in the Spanish emotional sense, use "sensitive". Example: "That's a very sensible idea" = That is a very reasonable, practical idea.
How do you learn false friends effectively?
The most effective way to internalise false friends is not to memorise them in a list but to hear them in real context repeatedly. When you hear a native speaker use "embarrassed" in a situation of shame, the contrast with "embarazada" becomes automatic. Stories with native British audio — like those in NexSpeak — create that automaticity naturally.
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NexSpeak teaches false friends through stories
In NexSpeak stories, characters make the same mistakes you make — and correct them in context. When Carlos says "I'm so embarrassed!" after a cultural misunderstanding, the contrast sticks permanently.
After each story, key false friends become English flashcards with spaced repetition, so confusion between similar words disappears for good.
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Conclusion
False friends are few — but they are exactly the ones behind the most costly misunderstandings: at the GP, in an interview, with your landlord. Start with the five catastrophic ones ("embarrassed", "excited", "molest", "carpet", "rope") and review the cards until the correct form comes out on its own.
If you want to keep polishing your English, false friends are only one piece: here are the 15 English mistakes Spanish speakers make — grammar and pronunciation included.
And if the fear of slipping up is what holds you back when speaking, check out our guide to overcoming the fear of speaking English, with 10 lifesaver phrases for any conversation.
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